...crazy stool

jwlyon1

wow. this is some cool stuff. and I know i'm just one step away from figuring it out! Dangit!

urgen

.... old (first)discussion about it: http://groups.google.com/group/Ruby-API/browse_thread/thread/982c56fae94d3537/fececa1a9d219f24?lnk=gst#fececa1a9d219f24

....Look it attentively... Be not lazy

jwlyon1

Got it!
Thanks for the hint!
w00t!

Gaieus

So can someone also explain why it is happening?
(That should be the ultimate goal of such a topic so that everyone can understand it)

jwlyon1

If I understand right, it's because the +/- values are associated with the front/back face of the sketchup geometry. By having them arranged in a specific pattern, it creates an unsolvable problem for the SSB.

But I certainly don't understand all the details yet.

Gaieus

Basically something like that,yes. The Bubble tool of SSB would want to "bulge" the shape towards the face normals and if you reverse some of the facets in the TIN, it gets "confused" and into an endless loop of bubbling to and fro. The beauty of it that since everything is happening "real time", it will continuously play the "animation".

In Urgen's model, you can find the "culprit", partially reversed surface hidden in the group.

It's mostly a useless "play" however but of course, you can even create "seemingly randomly waving" surfaces with it like for a pool or pond (if you stop the animation,it will"freeze" in its current phase).

Maybe this topic should go to the Tutorials? Let's see what Urgen says.

jwlyon1

It was tricky in the water example because the texture was applied to both sides...

Gaieus

More exactly, to the (whole) group.
When you are suspicious of a face orientation issue, always start with checking the model in monochrome face style. That reveals a lot of (and often important) details.

jwlyon1

Consider this a Sketchup Forensics Lesson 101.

It was the first real time I'd tried to deconstruct someone else's model.

Gaieus

You can always learn a lot from other models. It's really worth downloading and decomposing the ones posted in the Newbie or SketchUp Discussions as replies for others' questions.